document.write( "Question 471401: Solve by elimination method and what is the solution set?
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document.write( "8x-y=20
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document.write( "x+y=7
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Algebra.Com's Answer #323296 by robertb(5830)![]() ![]() You can put this solution on YOUR website! Add corrsponding sides of the two equations:\r \n" ); document.write( "\n" ); document.write( "9x = 27\r \n" ); document.write( "\n" ); document.write( "==> x = 3.\r \n" ); document.write( "\n" ); document.write( "To get y, multiply the bottom equation by -8, to get -8x - 8y = -56. \n" ); document.write( "Add this with the top equation, to get -y - 8y = -36, or -9y = -36, or y = 4. \n" ); document.write( " \n" ); document.write( " |